Diversité de la flore ligneuse à la périphérie du Parc national de Waza (Cameroun)

Jiagho, Evaliste Remi; Zapfack, Louis; Banoho, Louis Paul Roger Kabelong; Tsayem-Demaze, Moise; Corbonnois, Jeannine; Tchawa, Paul

doi:10.4000/vertigo.17249

Cited by 21 publications

(24 citation statements)

References 3 publications

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“…In addition, this abundance decreases with the increasing of diameter classes indicating natural regeneration in the study area. This justifies the appearance of the "J reversed" curve which is a sign of ecological vigor and the guarantee of the sustainability of the population in an ecosystem [41]. Although hedgerows are artificially implemented, this same trend has been found in this type of land use.…”

Section: Discussionsupporting

confidence: 54%

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Diversity, Structure and Carbon Stocks from Three Pools in the Kouoghap Sacred Forest, Hedgerows and Eucalyptus Plantations in the Batoufam Locality (West Cameroon)

Tchatchouang¹,

Djomo²,

Tajeukem³

et al. 2018

AEES

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The aim of this study was to make an inventory of the trees and estimate hedgerows and eucalyptus plantations carbon stocks in comparison with that of the Kouoghap sacred forest which is the only landscape having retained its original character. This study was conducted in the sacred forest, hedgerows and Eucalyptus plantations, which are the predominant land use type of Batoufam locality. Inventory data of trees with diameter ≥10 cm were made in 5 transects of 800 m x 5 m for the sacred forest and 10 transects of 300m x 5m for hedgerows and Eucalyptus plantations. The above and below ground biomass of trees was estimated using allometric equations; that of litter collected in 30 square plots of 0.5m x 0.5m, was estimated by the destructive method. A total of 70 and 11 trees species were respectively recorded in the sacred forest and hedgerows. However, Eucalyptus plantations are monospecific (only one trees species was found). The Shannon index (3.51) showed a rich floristic diversity in the sacred forest and weak diversity in hedgerows (1.94). The abundance of trees decreases with the increase in diameter classes of the sacred forest and hedgerows therefore forming and irregular appearance in the Eucalyptus plantations. No significant difference was found between these three land use according to the carbon stocks which varied from 130 to 196 tC.ha -1 for aboveground and from 31 to 47 tC.ha -1 for belowground carbon. As compared to, that of litter which was significantly different between the sacred forest (6.40 tC.ha -1 ), hedgerows (9.39 tC.ha -1 ) and Eucalyptus plantations (10.96 tC.ha -1 ). This study confirmed the conservation of biodiversity through sacred forest and also the need to take into account other types of lands use in policies to fight against climate changes given the amount of carbon they store.

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Section: Discussionsupporting

confidence: 54%

“…On the other hand, in Eucalyptus plantations, the curve has an irregular shape. However, the trees.ha -1 remains higher in classes [10-20] and [40][41][42][43][44][45][46][47][48][49][50].…”

Section: Floristic Diversity In the Study Areamentioning

confidence: 99%

Diversity, Structure and Carbon Stocks from Three Pools in the Kouoghap Sacred Forest, Hedgerows and Eucalyptus Plantations in the Batoufam Locality (West Cameroon)

Tchatchouang¹,

Djomo²,

Tajeukem³

et al. 2018

AEES

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“…carbon stocks in agrosystems in Africa (Sonwa et al 2001;2007;Zapfack et al 2002;Saint-André et al 2005;Ngueguim et al 2009;Adamou 2010;Mapongmetsem et al 2011;Mohamed et al 2011;Kemeuze et al 2015;Manfo et al 2015;Noiha et al 2015a;2017;Djongmo 2016;Jiagho et al 2016;Hamadou 2016;Ngossomo 2016;Witanou 2016); the latter, carried out in the various agroforests existing in Africa, describe these systems very little, and very few of these studies present a comparative study of the sequestration potential of these artificial ecological systems among themselves. At this time when natural ecosystems are disappearing at an alarming rate, it is clearly necessary today to outline the carbon sequestration potential of agrosystems; so that, their compensatory role in the mitigation process of Climate change be made known.…”

Section: Introductionmentioning

confidence: 99%

“…Deforestation, biomass burning, conversion of natural to agricultural ecosystems, drainage of wetlands and soil cultivation are the principal causes of greenhouse gas emissions (Lal 2004). Several works have showed the role of agroforestry systems as an opportunity to reduce CO 2 concentrations in the atmosphere by increasing carbon (C) stocks in agricultural lands (Zapfack et al 2002;Albrecht & Kandji 2003;Oelbermann et al 2005;Saint-André et al 2005;Lufafa et al 2008;Takimoto et al 2008;Singh & Lodhiyal 2009;Torres et al 2010;Kumar et al 2011;Hergoualc'h et al 2012;Kuyah et al 2012;Thangata & Hildebrand 2012;Somarriba et al 2013;Kemeuze et al 2015;Manfo et al 2015;Jiagho et al 2016;Noiha et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Vegetation structure, carbon sequestration potential and species conservation in four agroforestry systems in Cameroon (Tropical Africa)

et al. 2018

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As the rate of forest degradation continues to rise, agroforestry may serve as a way of conserving species and carbon sinks. Th e aim of this study was to assess agrobiodiversity and carbon sequestration potential in agrosystems in Cameroon. Th ree age groups of agrosystems were studied. Data were collected in 100x50 m 2 quadrates. Density ranged from 53.17±0.08 to 1463±50.11; basal area from 2.07±0.00 to 988.39±16.13 m 2 /ha; Shannon diversity from 3.3±0.71 to 3.68±0.72; Carbon storage from 12.1±0.27 to 54.65±1.38 t C/ha for 1-10-year-old agrosystems with lowest values in neem; 34.78±0.87 to 71.34±1.6 t C/ha for 10-20-year-old stands with lowest values in cashew; 28.24±0.04 to 108.51±2.46 t C/ha for +20-year-old stands with highest values in eucalyptus; Carbon sequestration potential from 296.7±1.98 to 859.33±10.01 t CO 2eq /ha. Th e highest carbon stocks were found in eucalyptus stands (p<0.05). Several endogenous species, especially Afzelia bipindensis (EN), Leptoderris ledermannii (EN), Mansonia altissima (EN), Entandrophragma cylindricum (VU), Nesogordonia papaverifera (VU), Quassia sanguinea (VU), Vitellaria paradoxa (VU), Afzelia africana (VU), Erythrina senegalensis (LC), Detarium microcarpum (LC), senna spectabilis (LC), were assessed. Other overexploited species, especially Carissa edulis, Zanthoxylum zanthoxyloides, Adansonia digitata, Securidaca longepedonculata, were assessed as well. Th e studied systems are signifi cant CO 2eq sinks and refuge centre for agrobiodiversity.

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“…Le climat est du type Sahélien avec deux saisons : une longue saison sèche allant de novembre à juin et une courte saison des pluies de juillet à octobre avec 800 mm/an (Suchel, 1987). En plein saison sèche, la température est située autour de 35° C. La végétation est dominée par la steppe sahélienne à épineux à dominance Acacia seyal, Balanites aegyptiaca, Capparis spp., Combretum aculeatum et Ziziphus abyssinica (Fondoun, 2001 ;Jiagho et al, 2016). (Arbonnier, 2002).…”

Section: Introductionunclassified

Structure écologique et production fruitière de Haematostaphis barteri Hook. F en la zone sahélienne du Cameroun

Hamawa¹,

Balna²,

Konsala³

2019

J. App. Bioscience.

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Published online at www.m.elewa.org on 31 st October 2018 https://dx.doi.org/10.4314/jab.v130i1.10 RESUME Objectif : évaluer la structure écologique et la production de fruits de Haematostaphis barteri pour fournir les informations nécessaires à une meilleure gestion et conservation de l'espèce au Cameroun. Méthodologie et Résultats : Dans quatre sites, 48 parcelles d'un hectare ont servi pour des inventaires forestiers de Haematostaphis barteri et 120 arbres l'ont été pour quantifier la production. La distribution de diamètre montre une courbe en J renversé, caractéristique des populations jeunes. La densité varie de 13 à 17 individus/ha. La surface terrière varie de 0,28 à 0,49 m²/ha, le diamètre varie de 17,31 à 20,57 cm. Le nombre de fruits par panicule et par arbre varie de 15 à 28 et de 2346 à 7877 respectivement. L'analyse des paramètres dendrométriques et de production montre une différence significative (P < 0,001) entre populations. Conclusion et Application des résultats : L'environnement est le facteur qui distingue le mieux les différentes populations et explique mieux les variations observées entre elles en ce qui concerne leurs caractéristiques structurelles et de production. Cependant il serait nécessaire de ressortir l'impact de la surexploitation sur la distribution et la production dans les différents sites.

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Diversité de la flore ligneuse à la périphérie du Parc national de Waza (Cameroun)

Cited by 21 publications

References 3 publications

Diversity, Structure and Carbon Stocks from Three Pools in the Kouoghap Sacred Forest, Hedgerows and <i>Eucalyptus</i> Plantations in the Batoufam Locality (West Cameroon)

Diversity, Structure and Carbon Stocks from Three Pools in the Kouoghap Sacred Forest, Hedgerows and <i>Eucalyptus</i> Plantations in the Batoufam Locality (West Cameroon)

Vegetation structure, carbon sequestration potential and species conservation in four agroforestry systems in Cameroon (Tropical Africa)

Structure écologique et production fruitière de <i>Haematostaphis barteri</i> Hook. F en la zone sahélienne du Cameroun

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